/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.icanci.snow.spring.mvc.render.impl;

import cn.icanci.snow.spring.mvc.RequestProcessorChain;
import cn.icanci.snow.spring.mvc.render.ResultRender;

import java.io.PrintWriter;

import com.google.gson.Gson;

/**
 * 返回JSON结果
 *
 * @author icanci
 * @date Created in 2021/05/19 17:29
 * @version 1.0
 */
public class JsonResultRender implements ResultRender {
    private Object jsonData;

    public JsonResultRender(Object jsonData) {
        this.jsonData = jsonData;
    }

    @Override
    public void render(RequestProcessorChain requestProcessorChain) throws Exception {
        // 设置响应头
        requestProcessorChain.getResponse().setContentType("application/json");
        requestProcessorChain.getResponse().setCharacterEncoding("UTF-8");
        // 响应流写入经过gson格式化之后的处理结果
        try (PrintWriter writer = requestProcessorChain.getResponse().getWriter()) {
            Gson gson = new Gson();
            writer.write(gson.toJson(jsonData));
            writer.flush();
        }
    }
}
